Tube-bending machine.



No.'727,676. BATENTED MAY 12-, 1903. J. E. ODONNELL.

TUBE BENDING MACHINE.

APPLICATION FILED OOT. 9,1902.

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PATENTED MAY 12, 1903.

' J. B. ODONNELL.

TUBE BENDING MACHINE.

APPLICATION FILED OUT. 9, 1902. I

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Patented May 12, 1903.

PATENT OFFICE.

JOSEPH EDWARD ODONNELL, OF CAMDEN, NEW JERSEY.

TUBE-BENDING MACHINE.

sPEGIFI CATION forming part of Letters Patent N 0. 727,676, dated May 12, 1903. Application filed October 9, 1902. Serial No. 126,571. (No model.)

To aZZ whom it may concern: 7

Be it known that I,JOSEPH EDWARD ODoN- NELL, a citizen of the United States, residing at Camden, countyof Camden, and State of New Jersey, have invented-a certain new and useful Improvement in Tube-Bending Machines, of which the following is a specifica- Lion. I

My invention relates to a new and useful improvement in tube-bending machines, and has for its'object to provide a'machine of this description by which tubes can be bent in different shapes Without flattening said tubes in bending.

With this end in View the inventioln consists in the details of construction and combination of elements hereinafter set forth and then specifically designated by the claims.

In order that those skilled in the art to which this invention appertains may understand how to make and use the same, the con struction and operation will now be described in detail, referring to the accompanying drawings, forming a part of this specification, in Which 7 Figure 1 is a plan view of the machine; Fig. 2, alongitudinal sectional View; Fig. 3, an end view of the machine; Fig. 4, a perspective view of the ,stock and its templet adapted to be attached thereto; Fig. 5, a perspective view of the adjustable chock.

A represents the bed-plate of the machine, which may besupported in any suitable manner. Thisibedapiate is formed'as a segment of a circle and around itsperiphery is provided with cogs B.

0 represents the centerupon which the segment is struck.

D is a block secured rigidly to the upper surface of the bed-plate.

E Erepresent the templet, adapted to be socured to the block around which the tube is to be bent. This templet is made in the form of a quarter-circle struck from the center O and in its'curved peripheryis formed- .a groove E in which the tube is adapted to lie While being bent. Thetemplet is made removable from the block'for the:p'urp'osefof securing to the block'templets of different sizes, and it may be secured to the block in any convenient manner, so as to be readily removable; but that shown in the drawings consists of forming upon the templet a tongue E and the block D is formed angular where the templet fits upon the same, and the templet is cut out V shape to fit upon this angular portion. The tongue E enters a groove formed in each surface of the block, and then double dovetail pins or wedges F are forced downward through the tongue, dovetail grooves being formed in the templet and also in the block in which fit the double dovetail pins or wedges F.

G is a' leverwhicligis. pivoted at its inner end to the block D at the point C by means of the boltG. Thus when the lever Gr swings -prongs of the lever is slotted, as indicated at G and in-these slots is adapted to slide the forked's'lide IIu Between the ends of the prongs of this forked slide is pivoted the stock I of the bending-segment J, and this bending-segment is formed identical with the templet E and has a groove J formed in its periphery in which the tube lies while being bent. This bending-segment is secured to its stock I in the same manner as the templet E is secured to the block D. A tongue J protrudes into a groove formed in the stock, and double dovetail. pins or wedges J serve to bind the two together. oted to the prongs of the slide H by means of a bolt 1, which passes through both of the prongs and also through the stock.

K is a screw-threaded rod swiveled at one end in the slide H and threaded through the housing G of the lever G. This screw-threaded rod K is longitudinally grooved-,as indicated at K in Fig. 1, and located upon this screw-threaded rod,'-:within the housing G is a beveled wheel L,-which is not threaded The stock I is p'ivupon the rod,bu t is connected to said rod by I means of a key entering the groove K, so that the rod may turn by the gear L to allow the rod longitudinal movement relative to said gear.

M is a beveled gear-wheel in mesh with the gear-wheel L, and this beveled wheel M is secured on the lower end of an upright shaft M, jourualed in the housing, and on the upper end of this shaft issecured a hand-wheel M for the purpose of turning the gear-wheel M. Thus by rotating the hand-wheel M motion will be communicated to the gear L, which will in turn revolve the screw-threaded rod K, and this rod being threaded in the housing will move the slide H, and consequently the bending-segment J, toward or away from the templet E, according to which direction the hand-wheel M is revolved.

For the purpose of revolving the bendingsegment J around the templet E, I journal through the housing G an upright shaft N, upon the lowerend of which is secured a gear 0, which is in'mesh with the cogs B upon the periphery of the bed-plate A. The upper end of this upright shaft N carries a worm-wheel P, which is in mesh with the worm Q, secured upon the end of a horizontal shaft R, which is arranged parallel with the lever G and directly above the same, it being journaled at its outer end in a standard S, arising from the lever G, and at its inner end it is journaled to a bearing S, pivoted to the block D at the point 0. Upon the inner end of the shaft R is secured a beveled wheel R, which is in mesh with an idle beveled wheel T, journaled upon an upright stud in the block D at the center 0.

U is a beveled wheel, also in mesh with the beveled Wheel T, which is secured upon the end of a shaft U, journaled in the block D, and this shaft U is the power-shaft, which is adapted to be rotated by any suitable source of power. Thus it will be seen that by rotating the shaft U motion will be communicated to the shaft R, which through the wormwheel and gear 0 will cause the lever D, and consequently the bending-block J, to travel in a circle concentric with the center C.

V is a chock which is adapted to hold the tube in position while it is being bent, and this chock is made in two parts, so that liners may be placed between the parts, if necessary, to accommodate larger-size tubes. An upright bolt V passes through the chock and serves to secure it to the bed-plate, and this chock rests upon ratchet-bars W, secured to the bed-plate, and the chocks are provided with pawls W, adapted .to engage the ratchetteeth of the ratchet-bars WV. Soto adjust the chock it is only necessary to loosen the bolt V when the chock may be slid to any position desired and will be held against any retrograde movement by means of the pawls W, even if the bolt V does not serve to hold the chock sufficiently.

In operation the machine is as follows: In inserting a straight tube in the machine the bending-lever G will be placed in the position shown in Fig. 1 and the tube to be bent will then be inserted between the templet and the bending-segment. The chock V will then be forced up tightly against the tube, and then by rotating the hand-wheel M in the proper direction the bending-segment J will be forced into tight contact with the tube, and then by communicating power to the shaft U the gear 0 will be caused to revolve, and it being in mesh with the cogs B will cause the lever G, and consequently the slide H and bending-wheel .I, to travel in the direction of the arrow shown in Fig. l, and when these parts have reached a position at right angles to the position shown in Fig. 1 a right-angle bend will be formed in the tube.

The opening formed by the two. grooves E and J in the templet and bending-segment, respectively, when brought together will not form a true circle; but the horizontal diameter will be larger than the vertical diameter. Thus as the tube is being bent the bending segment will not contact the tube upon the back, and this will counteract the tendency of the tube to flatten as it is being bent. After the tube is bent it is very easily removed or adjusted for further bending by revolving the hand-wheel M so'as to back the bending-segment away from its contact with the tube. When it is desired to bend difierent-size tubes, the templet E and bending-segment J may be easily removed from the block D and stock I and other size parts substituted.

The principal advantage of my invention is the adjustability of the bending-segment, as it allows for the manipulation of the tube, so that almost any curve can be given to the same. In fact, it can be bent in the form of a circle, if necessary,

Another advantage of my invention is the simplicity of the same, and by means of the few parts employed the same is made very durable.

Of course it is obvious that all of the pivotal parts of the machine could be, if desired, fitted with either roller or ball bearings to reduce the friction.

I do not wish to be limited to the exact construction here shown, as slight modifications could be made without departing from the spirit of my invention.

Having thus fully described my invention, what I claim as new and useful is- 1. In a machine of the character described, a segmental bedplate, a block secured rigidly to said bed-plate, a segmental templet removably secured to said block, a bendinglever pivoted to said block, the periphery of the templet being concentric with said pivotal point, longitudinal guideways formed in the bending-lever, a forked slide adapted to be guided in said guideways, a stock journaled between the two prongs of said forked slide, a bending-segment removably secured to said stock, said bending-segment being of the same radius as the templet,grooves formed in the periphery of both the templet and the bending-segment, said grooves so formed that the bending-segment will not contact the tube upon its horizontal diameter, a screw-threaded rod swiveled in the forked slide and threaded through the outer end of the bending-lever, a beveled gear wheel feathered upon said screwthreaded rod, a beveled gear-wheel in mesh with the first-named gear-wheel, a handwheel for turning the last-named gear-wheel, an adjustable chock arranged upon the bedplate, and means for revolving the bendinglever, as and for the purpose set forth.

2. In combination in a machine of the character described, a segmental bed-plate, cogteeth formed upon the periphery of said bedplate, a block secured rigidly to the bed-plate, a segmental templet removabl y secured to the block, a bending-lever pivoted to the block, the periphery of the templetbeing concentric with said pivotal point, longitudinal guideways formed in the beuding-lever,'a slide fitted to slide in said guideways, a bendingsegment journaled in said slide, grooves formed in the periphery of the templet and the bending-segment, means for causing said bending-segment to travel toward and away from the templet, a gear-wheel in mesh with the cogs upon the periphery of the bed-plate, an upright shaft to which said gear-wheel is secured, said shaft being journaled in the outer end of the bending-lever, aworm-wheel secured to the upper end of said shaft, a

horizontal shaft, a worm in mesh with the worm-wheel and secured on the outer end of the horizontal shaft, said shaft being journaled at the outer end to the bending-lever, means for revolving said horizontal shaft so as to cause the bending-lever to turn upon its pivotal point, and an adjustable chock arranged upon the bed-plate, as and for the purpose specified.

In testimony whereof I have hereunto affixed my signature in the presence of two subscribing witnesses.

J. EDWARD ODONNELL.

Witnesses:

S. D. HEINRICHS, L. W. MORRISON. 

